EP0748423B1 - Dispositif de commande pour embrayage de vehicule automobile et procede pour la mise en uvre de ce dispositif de commande - Google Patents

Dispositif de commande pour embrayage de vehicule automobile et procede pour la mise en uvre de ce dispositif de commande Download PDF

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Publication number
EP0748423B1
EP0748423B1 EP95942757A EP95942757A EP0748423B1 EP 0748423 B1 EP0748423 B1 EP 0748423B1 EP 95942757 A EP95942757 A EP 95942757A EP 95942757 A EP95942757 A EP 95942757A EP 0748423 B1 EP0748423 B1 EP 0748423B1
Authority
EP
European Patent Office
Prior art keywords
clutch
receiver
piston
actuator
output member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95942757A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0748423A1 (fr
Inventor
Eric Arquisch
Bernard Stragier
Christian Hoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo SE
Original Assignee
Valeo SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR9415691A external-priority patent/FR2728516A1/fr
Application filed by Valeo SE filed Critical Valeo SE
Publication of EP0748423A1 publication Critical patent/EP0748423A1/fr
Application granted granted Critical
Publication of EP0748423B1 publication Critical patent/EP0748423B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/066—Control of fluid pressure, e.g. using an accumulator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/102—Actuator
    • F16D2500/1021—Electrical type
    • F16D2500/1023—Electric motor
    • F16D2500/1024—Electric motor combined with hydraulic actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10406—Clutch position
    • F16D2500/10412—Transmission line of a vehicle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/302—Signal inputs from the actuator
    • F16D2500/3026—Stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/501—Relating the actuator
    • F16D2500/5012—Accurate determination of the clutch positions, e.g. treating the signal from the position sensor, or by using two position sensors for determination

Definitions

  • the invention relates to control devices for a motor vehicle clutch of the kind comprising a actuator connected to a receiver by a pipe hydraulic, with, bypass on this pipeline hydraulic, a tarpaulin solenoid valve controlling its connection to a hydraulic fluid tank.
  • the actuator is reduced to a pump, and, the whole operating in a loop, the solenoid valve, open for the engagement configuration of the clutch, is closed for the passage thereof release configuration, while an elastic valve, interposed on the hydraulic line between the pump and the receiver, ensures the progressive return of the clutch to its engagement configuration.
  • the actuator comprises a piston, which, under the control of a electric motor, itself under the control of a unit of piloting, and in association with elastic means assistance, is able to work on the pipeline hydraulic connecting it to the receiver.
  • the engine electric ensures, through a transmission, a given position of the actuator piston, and normally results from the output device that the receiver has for this purpose, a positioning suitable for the clutch release bearing to which this clutch.
  • the actuator is connected to a receiver by a hydraulic pipe, said actuator comprising itself a piston, which under the control of an electric motor, itself under the control of a piloting unit, is able to work on this hydraulic line, with, in bypass on this hydraulic line, a solenoid valve cover setting controlling its connection to a tank of hydraulic fluid, said solenoid valve being normally open for engagement (or clutch) configuration of the clutch and closed for the passage of the clutch from its engagement configuration to its release configuration (or release).
  • the piston belongs to a hydraulic transmitter and pushes, when switching from engagement configuration to clutch release configuration, fluid in the hydraulic pipe of variable length according to equipped vehicle.
  • the hydraulic receiver On a fixed part of the vehicle, for example the bell clutch, is fixed the hydraulic receiver whose part upstream receives the thrust of the liquid and the downstream part transmits moving to a clutch fork acting itself on a clean release bearing acting on the device clutch release, usually the inner end of the fingers of a diaphragm.
  • the control device has no more effort and movement to be transmitted and is then in equilibrium. It is then possible venting, commonly known as venting tarpaulin, on the one hand, to avoid wear and tear possible friction disc, that includes the clutch and, on the other hand, to get rid of a possible variation in volume liquid contained in the pipe, following a variation temperature since the last tarpaulin operation. This operation is carried out using the above-mentioned solenoid valve.
  • the solenoid valve During a declutching operation (passage of the engagement configuration to release configuration) the solenoid valve is closed and the receiver piston pushes and moves the clutch fork, which then operates the stop clutch release. During a reverse clutch operation, the solenoid valve is closed and said piston retains the fork clutch.
  • the device works correctly as long as the variation under the hood of the vehicle does not cause no noticeable expansion or contraction in a phase of running the vehicle or the clutch would never go to the fully engaged position (engagement configuration).
  • a contraction of the column of liquid in the pipeline causes a clutch movement (passage of the release configuration to engagement configuration).
  • the risk in this case is that the dilation is such that for a given position of the actuator piston, called piston transmitter, the position of the receiver and therefore the range of clutch and the clutch release bearing is too out of phase.
  • the means of assistance would then be imperfect and the degraded electric motor performance.
  • the dilation can be such, if the variation of temperature reaches 100 ° for example, that the total stroke of walkout can be accomplished.
  • the device would then be in configuration of engagement seen from the transmitter and in release configuration seen from the receiver.
  • the subject of the invention is a control device capable of allow to correct such a drift and a process specific to its Implementation.
  • This control device which is of the type comprising a actuator connected to a receiver by a pipe hydraulic, said actuator itself comprising a piston, which, under the control of an electric motor, itself under the control of a steering unit, is able to intervene on this hydraulic line, with, bypass on this hydraulic line, a tarpaulin solenoid valve controlling its connection to a hydraulic fluid tank, said solenoid valve being normally open for clutch engagement configuration and closed for passage of the clutch from its engagement configuration to its clearance configuration and vice versa, is in a way general characterized in that it includes a position, which, associated with the actuator, is sensitive to the position of the piston, which it comprises, and a sensor position, which, associated with the receiver, is sensitive to the position of the output device thereof, in that the information delivered by these position sensors are directed to the control unit, and that, if, for the configuration of clutch release, there is a drift from the position of the output device of the receiver relative to that of the actuator piston, we ensure, under the control of the control unit, a correction cycle during
  • the output member of the receiver remains permanently suitably positioned relative to the actuator piston.
  • an isolation solenoid valve is interposed on the hydraulic pipe.
  • this is to ensure the clutch control 10 of a motor 11, in practice a motor of motor vehicle.
  • the clutch 10 is supposed to include a disc of friction fitted with friction linings.
  • the control device 15 used for the control of the clutch 10 comprises an actuator 16, which, by a hydraulic line 17, is connected to a receiver 18 capable of act on the release fork 12 by an output member 19.
  • the receiver 18 is of the hydraulic type and consists of a hydraulic cylinder whose piston rod forms the output member 19.
  • this outlet member 19 is coupled to a lever 20 wedged in rotation on the axis 13 on which is also stalled in clutch release lever 12.
  • the actuator 16 is for example of the type of that described in documents FR-A-2,523,743, 2,564,920 and 2,541,793 and FR 94 07518 of June 20, 1994.
  • This actuator 16 is thus well known in itself, and not directly related to the present invention, it will not not described in full detail here.
  • the actuator is of the compact type and includes a motor electric whose output axis is screw-shaped and drives a nut transforming a rotary movement into movement linear.
  • This nut is linked by a suitable means to the piston of a hydraulic transmitter forming an output element for all.
  • Said means comprise at least one train of rollers.
  • the control unit 24 will not be described here either; it will suffice to indicate that it includes a calculator electronics which receives information on various parameters and intervenes accordingly.
  • a tarpaulin solenoid valve 27 which is also under the control of the control unit 24, controls the connection of this hydraulic line 17 to a hydraulic fluid tank 28.
  • this isolation solenoid valve 29 is under the control of the piloting 24.
  • the control device 15 comprises, in addition, a position sensor 30, which, associated with the actuator 16, is sensitive to the position of the piston 22 which the latter comprises, and a position sensor 31, which, associated with the receiver 18, is sensitive to the position of the output member 19 of this receiver 18.
  • These position sensors may consist of sensors rotary, linear potentiometers, or other devices.
  • the information delivered by these position sensors 30 and 31 are directed, with others, to the control unit 24.
  • this other information consist for example of the speed of rotation of the motor vehicle, at the speed of rotation of the input shaft of the gearbox, in the release lever position 25 and in the accelerator pedal position.
  • the provisions are such that, for the clutch engagement configuration 10, we maintain open, by the control unit 24, both the solenoid valve of covering 27 that the isolation solenoid valve 29, such as shown in figure 2.
  • the tarpaulin solenoid valve 27 is in turn closed, as shown in Figure 3E, and, as shown schematically by arrow F2 in this figure 3E, the piston 22 of the actuator 16 is then moved in the opposite direction to the previous one, which is that corresponding to a passage in release configuration of clutch 10, for re-pressure of the liquid in the hydraulic line 17, and thus prevent it either later the seat of a possible water hammer at the opening of the isolation solenoid valve 29.
  • this solenoid valve Isolation 29 is opened again, as shown in the FIG. 3F, and the output member 19 of the receiver 18 is then duly refocused relative to the piston 22 of the actuator 16.
  • the electric motor 23 of the actuator 16 ensures that, under the control of the control unit 24, the position sensors 30 and 31 give information which are correlated with each other.
  • the initial displacement of the piston of the actuator in the direction corresponding to the transition to clutch engagement configuration may not be necessary, depending on the type of tarpaulin setting artwork.
  • hydraulic line 17 connects directly the actuator 16, more precisely the transmitter of the latter comprising the piston 22, at the receiver 18.
  • control device includes a position sensor, which, associated with the actuator 16, is sensitive to the position of the piston 22, and a position sensor 31, which, associated with the receiver 18, is sensitive to the position of the output member 19 thereof.
  • the information delivered by these sensors 30, 31, by example of the rotary, linear or other potentiometric type, are directed to the control unit 24 receiving other information as in figure 1 and in particular information relating to the position of the release lever 25.
  • the position of the output member 19 of the receiver is memorized by the control unit 24 (the computer) when the piston 22 of the actuator 16 has been stabilized at the release configuration position of the clutch 10 called PT.
  • This PT position is fixed and identifiable for the entire driving session to come.
  • the computer 24 (the control unit) will check for this same PT position as the current value read at the level of the output 19 of receiver 18 is identical to that of position MB.
  • the computer 24 will start a corrective action to bring the clutch release bearing to the original MB position.
  • the opening time is increased by a fraction.
  • the control device is self-learning.
  • the computer 24 stores the position of the output 19 and therefore from receiver 18 using the position 31 associated with the output member 19. This memory is the position of the clutch release bearing when the clutch is in new condition.
  • the computer 24 thanks to the sensor 31 can check the current position of said sort 19 and therefore the clutch release bearing with respect to the memorizing its position in new condition (clutch new) and report by an appropriate means, such as a lamp indicator controlled by the computer 24, that its clutch is worn and that it must be exchanged.
  • the elastic assistance means can be integrated into the clutch as described in document FR-A-2 718,205.
  • the clutch includes an adjustment system corrective automatically compensating at least the wear of friction linings of the clutch disc and the means assist elastics are arranged parallel to the diaphragm, which usually comprises the clutch.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
EP95942757A 1994-12-27 1995-12-18 Dispositif de commande pour embrayage de vehicule automobile et procede pour la mise en uvre de ce dispositif de commande Expired - Lifetime EP0748423B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9415691A FR2728516A1 (fr) 1994-12-27 1994-12-27 Dispositif de commande pour embrayage de vehicule automobile et procede pour la mise en oeuvre de ce dispositif de commande
FR9415691 1994-12-27
FR9513840 1995-11-22
FR9513840A FR2728517A1 (fr) 1994-12-27 1995-11-22 Dispositif de commande pour embrayage de vehicule automobile et procede pour la mise en oeuvre de ce dispositif de commande
PCT/FR1995/001683 WO1996020354A1 (fr) 1994-12-27 1995-12-18 Dispositif de commande pour embrayage de vehicule automobile et procede pour la mise en ×uvre de ce dispositif de commande

Publications (2)

Publication Number Publication Date
EP0748423A1 EP0748423A1 (fr) 1996-12-18
EP0748423B1 true EP0748423B1 (fr) 2000-03-08

Family

ID=26231643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95942757A Expired - Lifetime EP0748423B1 (fr) 1994-12-27 1995-12-18 Dispositif de commande pour embrayage de vehicule automobile et procede pour la mise en uvre de ce dispositif de commande

Country Status (4)

Country Link
EP (1) EP0748423B1 (enrdf_load_stackoverflow)
DE (1) DE69515469T2 (enrdf_load_stackoverflow)
FR (1) FR2728517A1 (enrdf_load_stackoverflow)
WO (1) WO1996020354A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2458498B (en) 2008-03-20 2012-02-08 Ford Global Tech Llc A method and apparatus for validating the output from a position sensor
ES2426225T5 (es) † 2009-07-14 2024-03-05 Britax Roemer Kindersicherheit Gmbh Asiento para niños con protección contra impactos laterales

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1141137A (fr) * 1956-01-18 1957-08-26 Rech Etudes Production Sarl Système de commande automatique d'embrayage pour automobiles
DE2636982A1 (de) * 1976-08-17 1978-02-23 Bosch Gmbh Robert Betaetigungseinrichtung fuer eine kupplung
GB2211577B (en) * 1987-10-26 1991-05-08 Automotive Products Plc A clutch control system
DE4138625B4 (de) * 1991-11-25 2010-07-22 Robert Bosch Gmbh Elektromotorischer Stellantrieb
DE4239703C2 (de) * 1992-11-26 2000-04-06 Opel Adam Ag Hydraulische Kupplungsbetätigung in Kraftfahrzeugen

Also Published As

Publication number Publication date
DE69515469T2 (de) 2000-08-03
EP0748423A1 (fr) 1996-12-18
WO1996020354A1 (fr) 1996-07-04
FR2728517B1 (enrdf_load_stackoverflow) 1997-02-28
DE69515469D1 (de) 2000-04-13
FR2728517A1 (fr) 1996-06-28

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